C9.3 Engines for Caterpillar Built Machines Unit Injector - Remove Caterpillar

Removal Procedure

Start By:

1. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".

2. Remove the fuel injection line. Refer to Disassembly and Assembly, "Fuel Lines - Remove and Install".

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Illustration 1	g01264292

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Illustration 2	g01264293

Note: Do not remove the quill tube. This action will reduce the risk of contamination to the system.

1. Fully loosen quill tube nut (1). Pull quill tube (1) out of the bore until you see O-ring seal (2). This action will ensure that the injector does not contact the quill tube during removal. At this time, inspect O-ring seal (2) for wear or for damage. Replace the O-ring seal if necessary.
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   Illustration 3	g02161166
   Typical Example

2. Disconnect harness assembly (3) from the unit injector.
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   Illustration 4	g02161316
   Typical Example

3. Loosen bolt (5) from clamp (6).

   Note: Do not remove bolt (5) until the unit injector is unseated.

   Note: When possible, remove the unit injector by hand by twisting the unit injector and pulling upward. Be sure not to strike the unit injector during the removal procedure.

4. If unit injector (4) cannot be removed by hand, go to Step 5.
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   Illustration 5	g02161361
   Typical Example

   Note: Do not damage the unit injector during removal. Side loading may damage to the unit injector.

5. Install Tooling (B) in unit injector clamp (6) and position Tooling (A) under unit injector clamp (6). Carefully remove unit injector (4) from the cylinder head.